What is NASA looking for on Mars?

NASA offers an easy explanation on how finding organic matter in rocks could lead to finding life on the red planet.

http://www.wgrz.com/video/2211138488001/1/What-is-NASA-looking-for-on-Marshttp://bc_gvpc.edgesuite.net/img/963482463001/201303/383/963482463001_2211106056001_961896998-154-1362750201549.jpg?pubId=963482463001What is NASA looking for on Mars?NASA offers an easy explanation on how finding organic matter in rocks could lead to finding life on the red planet.Explainermars roverrockvpcorganic mattereducationspaceGreen/EnvironmentPlanetscienceNASAouter spaceNational Newsred planet00:58